It hasn't been clear how they intend to enforce this. Will it just be an "By using this service, I confirm I am 16 or older" clause like the current system? Will we be required to submit ID to social media companies (it's claimed not)? Will the government be making verification through the updated 'MyGov' portal or the newly renamed 'myID' 'digital passport'?
Nobody is sure, and nobody is sure who is sure. There is tons of conflicting information out there.
NewsCorp have been pushing for it as well, which, as a rule, isn't a good thing, and the rest of our media seem just as confused as the populace.